1 # -*- encoding: binary -*-
4 module Rainbows::Epoll::Client
6 include Rainbows::EvCore
7 APP = Rainbows.server.app
8 Server = Rainbows::Epoll::Server
9 IN = SleepyPenguin::Epoll::IN | SleepyPenguin::Epoll::ET
10 OUT = SleepyPenguin::Epoll::OUT | SleepyPenguin::Epoll::ET
12 KATO.compare_by_identity if KATO.respond_to?(:compare_by_identity)
13 Rainbows.config!(self, :keepalive_timeout)
16 @@last_expire = Time.now
19 return if ((now = Time.now) - @@last_expire) < 1.0
20 if (ot = KEEPALIVE_TIMEOUT) >= 0
22 KATO.delete_if { |client, time| time < ot and client.timeout! }
29 EP.wait(nil, 1000) { |_, obj| obj.epoll_run }
30 while obj = ReRun.shift
36 Rainbows::Error.listen_loop(e)
37 end while Rainbows.tick || Server.nr > 0
42 @wr_queue = [] # may contain String, ResponsePipe, and StreamFile objects
50 case rv = kgio_tryread(CLIENT_HEADER_BUFFER_SIZE, RBUF)
53 return if @wr_queue[0] || closed?
55 KATO[self] = @@last_expire if :headers == @state
56 return EP.set(self, IN)
59 end until :close == @state
61 rescue Errno::ECONNRESET
66 def app_call input # called by on_read()
67 @env[RACK_INPUT] = input
68 @env[REMOTE_ADDR] = kgio_addr
69 status, headers, body = APP.call(@env.merge!(RACK_DEFAULTS))
70 ev_write_response(status, headers, body, @hp.next?)
73 def write_response_path(status, headers, body, alive)
78 defer_file(status, headers, body, alive, io, st)
79 elsif st.socket? || st.pipe?
80 chunk = stream_response_headers(status, headers, alive)
81 stream_response_body(body, io, chunk)
83 # char or block device... WTF?
84 write_response(status, headers, body, alive)
88 # used for streaming sockets and pipes
89 def stream_response_body(body, io, chunk)
90 pipe = (chunk ? Rainbows::Epoll::ResponseChunkPipe :
91 Rainbows::Epoll::ResponsePipe).new(io, self, body)
92 return @wr_queue << pipe if @wr_queue[0]
93 stream_pipe(pipe) or return
94 @wr_queue[0] or @wr_queue << Z
97 def ev_write_response(status, headers, body, alive)
98 if body.respond_to?(:to_path)
99 write_response_path(status, headers, body, alive)
101 write_response(status, headers, body, alive)
103 @state = alive ? :headers : :close
104 on_read(Z) if alive && 0 == @wr_queue.size && 0 != @buf.size
120 def on_deferred_write_complete
121 :close == @state and return close
122 0 == @buf.size ? on_readable : on_read(Z)
126 msg = Rainbows::Error.response(e) and kgio_trywrite(msg) rescue nil
131 def write_deferred(obj)
132 Rainbows::StreamFile === obj ? stream_file(obj) : stream_pipe(obj)
135 # writes until our write buffer is empty or we block
136 # returns true if we're done writing everything
138 obj = @wr_queue.shift
140 case rv = String === obj ? kgio_trywrite(obj) : write_deferred(obj)
142 obj = @wr_queue.shift or return on_deferred_write_complete
145 when :wait_writable # Strings and StreamFiles only
146 @wr_queue.unshift(obj)
158 case rv = kgio_trywrite(buf)
164 @wr_queue << buf.dup # >3-word 1.9 strings are copy-on-write
165 return EP.set(self, OUT)
168 @wr_queue << buf.dup # >3-word 1.9 strings are copy-on-write
172 @wr_queue.each { |x| x.respond_to?(:close) and x.close rescue nil }
187 def defer_file(status, headers, body, alive, io, st)
188 if r = sendfile_range(status, headers)
189 status, headers, range = r
190 write_headers(status, headers, alive)
191 range and defer_file_stream(range[0], range[1], io, body)
193 write_headers(status, headers, alive)
194 defer_file_stream(0, st.size, io, body)
198 # returns +nil+ on EOF, :wait_writable if the client blocks
199 def stream_file(sf) # +sf+ is a Rainbows::StreamFile object
200 case n = trysendfile(sf, sf.offset, sf.count)
203 0 == (sf.count -= n) and return sf.close
205 return n # :wait_writable or nil
212 def defer_file_stream(offset, count, io, body)
213 sf = Rainbows::StreamFile.new(offset, count, io, body)
215 stream_file(sf) or return
221 # this alternates between a push and pull model from the pipe -> client
222 # to avoid having too much data in userspace on either end.
223 def stream_pipe(pipe)
224 case buf = pipe.tryread
228 # client is blocked on write, client will pull from pipe later
234 # continue looping...
236 # pipe blocked on read, let the pipe push to the client in the future
241 return pipe.close # nil